(a)What is the name of surgical method of birth control (or preventing pregnancy) which is carried out (i) in men, and (ii) in women?
(b)Name the part of a seed which (i) contains stored food (ii) grows into root, and (iii) grows into shoot.
(a) The surgical method of birth control (or preventing pregnancy) carried out (i) in men is vasectomy, and (ii) in women is tubal ligation or tubectomy.
(b) The part of a seed that (i) contains stored food is known as cotyledons, (ii) grows into the root is radicle, and (iii) grows into a shoot is plumule.
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- The part of a seed which grows and develops into root on germination is:(a) cotyledon (b) plumule (c) follicle (d) radicle
- (a) What is chlorophyll? What part does chlorophyll play in photosynthesis?(b) (i) Which simple food is prepared first in the process of photosynthesis?(ii) Name the food which gets stored in plant leaves.
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- Which of the following are chemical changes?(i) decaying of wood(ii) burning of wood(iii) sawing of wood(iv) hammering of a nail into wood(a) (i) and (ii) (b) (ii) and (iii)(c) (iii) and (iv) (d) (i) and (iv)
- Which of the following are compounds?(i) CO (ii) No(iii) NO (iv) Co(a) (i) and (ii)(b) (ii) and (iii)(c) (i) and (iii)(d) (ii) and (iv)
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- (a) What is the name of surgical method of birth control in human males in which the sperm ducts are cut and ligated (tied) at both ends?(b) What is the name of surgical method of birth control in human females in which the oviducts are cut and ligated (tied) at both ends?(c) Name the contraceptive device used by the human males which acts as a sheath over the male organ and traps the sperms in it.(d) Name the contraceptive device used by human females which is put over the cervix.
- Which of the following are not ionic compounds?KClHClCCl4NaCl(a) (i) and (ii)(b) (ii) and (iii)(c) (iii) and (iv)(d) (i) and (iii)
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- In an ecosystem :(i) the flow of energy is unidirectional(ii) the flow of materials is unidirectional(iii) the flow of materials is cyclic(iv) the flow of energy is cyclic.(a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iv) (d) (i) and (iii)
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- X and Y are two human beings. The organ A in the reproductive system of X releases a mature gamete B once a month which goes into a tube-like structure C through a funnel-like opening. The organ D in the reproductive system of Y makes and releases gametes E which pass through a duct F and are introduced by an organ of Y, into the body of X. B and E fuse together in C to form a new cell G. The cell G divides repeatedly to form a ball of cells H which gets embedded in the lining of organ I of reproductive system of X where it grows and develops into a baby.(a) Name (i) organ A, and (ii) gamete B. (b) Write two names of tube-like structure C. (c) Name (i) organ D, and (ii) gamete E. (d) Write two names of duct F. (e) Name (i) cell G (ii) ball of cells H, and (iii) organ I. (f) Out of X and Y, which one is (i) male, and (ii) female?
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